Stability of the Vertical Autorotation of a Single-Winged Samara

[+] Author and Article Information
D. Seter, A. Rosen

Technion—Israel Institute of Technology, Haifa 32000, Israel

J. Appl. Mech 59(4), 1000-1008 (Dec 01, 1992) (9 pages) doi:10.1115/1.2894014 History: Received May 14, 1991; Revised July 31, 1991; Online March 31, 2008


A numerical model to investigate the stability of the vertical autorotation of a singlewinged samara is presented. This model is obtained after the method of small perturbations about an equilibrium state is applied on the nonlinear equations of motion of the samara. The aerodynamic stability derivatives of the wing are obtained by numerical differentiation. The model is used in order to study the influence of different parameters on the stability. Since the stability is highly dependent on the basic equilibrium state, the influence of the different parameters on the basic state is also presented and discussed. The theoretical model is validated by comparing its results with qualitative experimental results.

Copyright © 1992 by The American Society of Mechanical Engineers
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